Maglev Line-State Simulation Using Variable Guideway Force

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Solution Overview

Problem

Existing systems for simulating the operation of high-temperature superconducting (HTS) flux-pinning maglev trains on real tracks under uneven magnetic fields are limited by large volume and low operation speed due to the use of large-mass and irregular rotating magnetic track devices.

Innovation Solution

An apparatus and method for simulating a line running state of magnetic levitation, comprising a levitation-guidance mechanism, a moving mechanism, and a magnetic guideway fluctuation simulated mechanism. The levitation-guidance mechanism detects forces on a maglev train Dewar, while the moving mechanism positions it, and the magnetic guideway fluctuation simulated mechanism applies variable forces to simulate the electromagnetic forces experienced by a real maglev train.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a large-mass and irregular rotating magnetic track device is used to simulate the operation of HTS flux-pinning maglev train, then the simulation can be performed on a real track line under uneven magnetic field, but the system volume becomes large and the operation speed becomes low

Engineering Contradiction:
Improvesimulation accuracyVSAvoidoperation speed
Core Design Contradiction:
ReliabilityVSSpeed

Solution Approach 1:

Instead of moving the heavy magnetic track device to simulate train motion, the patent inverts the approach by keeping the magnetic track device stationary and moving the Dewar (train model) along it. This inversion allows the simulation to achieve the same relative motion effect while dramatically reducing the mass that needs to be moved, thereby increasing operation speed while maintaining simulation accuracy.

Inventive Principle:
Principle #13The other way round (Inversion)

Solution Approach 2:

The patent replaces the complex mechanical rotating magnetic track device with a simpler linear motion system where the Dewar moves along a stationary magnetic guideway. This substitution eliminates the need for large-mass rotation mechanisms while still achieving the simulation of uneven magnetic field effects through controlled linear motion and magnetic field variation.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

2Reliability

If a large-mass and irregular rotating magnetic track device is used to simulate the operation of HTS flux-pinning maglev train, then the simulation can be performed on a real track line under uneven magnetic field, but the system volume becomes large

Engineering Contradiction:
Improvesimulation accuracyVSAvoidsystem volume
Core Design Contradiction:
ReliabilityVSVolume of stationary object

Solution Approach 1:

The patent inverts the traditional simulation setup by making the magnetic track device stationary and the Dewar movable. This inversion compactsthe system because the heavy magnetic components remain fixed in a small space, while only the lightweight Dewar needs to move along a limited track length, thereby reducing overall system volume while maintaining simulation fidelity.

Inventive Principle:
Principle #13The other way round (Inversion)

Solution Approach 2:

The patent transitions from a complex three-dimensional rotating magnetic track structure to a simplified linear one-dimensional motion system. By confining the motion to a straight line along the magnetic guideway, the system achieves the necessary simulation capability with significantly reduced spatial requirements in all dimensions.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The solution enables more compact and efficient simulation of maglev train operation, allowing for the simulation of varying electromagnetic forces and vibrations, thereby improving the accuracy and speed of the simulation process.

Implementation Method 1

high-temperature superconducting (HTS) flux-pinning maglev train

Methodology Applied
Scientific EffectFlux pinning: Magnetism

Implementation Method 2

constantly-variable electromagnetic force applied to the single Dewar

Methodology Applied
Scientific EffectElectromagnetic force: Lorentz Force

Implementation Method 3

the magnetic field changing mechanism comprises a plurality of excitation strips; the plurality of excitation strips are arranged on a top of the permanent magnet guideway

Methodology Applied
Scientific EffectElectromagnetic induction: Electromagnetic Induction

Data Source

PatentUS12267027B2Apparatus and method for simulating line running state of magnetic levitation (maglev)
Publication Date: 2025.04.01 SOUTHWEST JIAOTONG UNIV
  • US12267027B2 patent drawing

AI summary

This application relates to simulation equipment, and more particularly to an apparatus and method for simulating a line running state of magnetic levitation. The apparatus includes a levitation-guidance mechanism, a moving mechanism and a magnetic guideway fluctuation simulated mechanism. The levitation-guidance mechanism is configured to detect a force on a single Dewar of a maglev train to be simulated. The moving mechanism is configured to move the levitation-guidance mechanism. The magnetic guideway fluctuation simulated mechanism is arranged below the levitation-guidance mechanism, and is configured to apply a variable force to the levitation-guidance mechanism. The variable force is configured to simulate a constantly-variable electromagnetic force applied to the levitation-guidance mechanism by a real track.